It is the ratio of the speed of light in a vacuum (c) to the speed of light in this medium (v): n = c / v. The bending of a light as it crosses the boundary into a different medium is determined by its refractive index, or how much the light is slowed down in the new medium. We see objects breaking at the boundary between media of different density because of refraction. Light rays are bent, or refracted, because light travels at different speeds in different media. Unless the light ray meets the boundary at exactly 90Â°, the direction of travel will change and the light ray is bent..
Want to know How tall is Alan Jackson? Ok, here we are. Find the answer of this question. Alan Jackson height is 6' 4 (193cm)
Don't know how he can claim almost 6ft2, he perhaps looks 6 foot but any legit 5ft11 can give a tallish impression at times like Timberlake, other times he looks too close to average to be considered tall. 177-178 cm guy said on 22/May/15. There are pics on google where Justin looks a bit taller than Andrew Garfield.